Re: chemistry sci-fi

Dirk Bruere at NeoPax wrote:

Mark Thorson wrote:
Fred Kasner wrote:
Those things could blow up if not cared for properly
and fill a lab with H2S in nothing flat. There were several
deaths at a Princeton lab when such occured. But mostly from
some courageous young faculty who went back inside to see if
any students could be rescued.

When I took organic lab, we were warned that the human
perception of H2S reaches a sort of plateau, above which
higher concentrations are not perceived as higher.
The stuff stinks really bad at low concentrations.

Is H2S as toxic as HCN?

I've inhaled plenty of both, though not at the same time.
All I can say is a visible white cloud -- no, that was
the HCl gas incident -- HCN is invisible -- emanating
from a sink in which incompatible materials (or,
contrariwise, all-too-compatible materials) were
disposed, had no odor that I could detect.
.